全文获取类型
收费全文 | 489篇 |
免费 | 31篇 |
国内免费 | 13篇 |
专业分类
耳鼻咽喉 | 1篇 |
儿科学 | 32篇 |
妇产科学 | 8篇 |
基础医学 | 51篇 |
口腔科学 | 9篇 |
临床医学 | 30篇 |
内科学 | 70篇 |
皮肤病学 | 19篇 |
神经病学 | 11篇 |
特种医学 | 138篇 |
外科学 | 55篇 |
综合类 | 33篇 |
预防医学 | 21篇 |
眼科学 | 6篇 |
药学 | 22篇 |
肿瘤学 | 27篇 |
出版年
2022年 | 1篇 |
2021年 | 6篇 |
2020年 | 2篇 |
2019年 | 2篇 |
2018年 | 5篇 |
2017年 | 2篇 |
2016年 | 5篇 |
2015年 | 14篇 |
2014年 | 7篇 |
2013年 | 10篇 |
2012年 | 4篇 |
2011年 | 15篇 |
2010年 | 24篇 |
2009年 | 30篇 |
2008年 | 13篇 |
2007年 | 24篇 |
2006年 | 29篇 |
2005年 | 21篇 |
2004年 | 20篇 |
2003年 | 10篇 |
2002年 | 8篇 |
2001年 | 16篇 |
2000年 | 6篇 |
1999年 | 1篇 |
1998年 | 20篇 |
1997年 | 36篇 |
1996年 | 21篇 |
1995年 | 22篇 |
1994年 | 16篇 |
1993年 | 6篇 |
1992年 | 4篇 |
1991年 | 1篇 |
1990年 | 8篇 |
1989年 | 13篇 |
1988年 | 9篇 |
1987年 | 15篇 |
1986年 | 9篇 |
1985年 | 10篇 |
1984年 | 5篇 |
1983年 | 9篇 |
1982年 | 7篇 |
1981年 | 9篇 |
1980年 | 12篇 |
1979年 | 1篇 |
1978年 | 4篇 |
1977年 | 7篇 |
1976年 | 8篇 |
1975年 | 5篇 |
1974年 | 1篇 |
排序方式: 共有533条查询结果,搜索用时 9 毫秒
81.
82.
van Uden CJ Nieman FH Voss GB Wesseling G Winkens RA Crebolder HF 《BMC health services research》2005,5(1):27
Background
In recent years, Dutch general practitioner (GP) out-of-hours service has been reorganised into large-scale GP cooperatives. Until now little is known about GPs' experiences with working at these cooperatives for out-of-hours care. The purpose of this study is to gain insight into GPs' satisfaction with working at GP cooperatives for out-of-hours care in separated and integrated cooperatives. 相似文献83.
Vorstand und AG Angeborene Herzfehler/Kinderherzchirurgie der DGTHG 《The Thoracic and cardiovascular surgeon》2006,54(2):73-77
The "Working Group for Congenital Heart Surgery and Pediatric Heart Surgery" of the German Society for Thoracic and Cardiovascular Surgery (GSTCVS) has analysed and recommended structures for congenital heart surgery departments in Germany. The document was worked out according to a similar paper approved earlier by the European Association for Cardio-thoracic Surgery (EACTS). The "Working Group" unifies the majority of cardiac surgeons involved in congenital heart surgery in Germany. Current structures of cardiac centers vary. Therefore the aim of this document is to elucidate additional structural needs for both highly specialized institutions and those for standard care. Specialized centers should allow for treatment of newborns and adult patients with congenital heart disease, include implementation of assist devices and transplantation, possess research facilities and ensure highest standards of education and training. Standard care units do not necessarily need to cater for the above mentioned spectrum. However, the evaluation of quality of care should be given priority in all centers involved in care of patients with congenital heart disease. Data acquisition and transfer must be guaranteed to both the GSTCVS and EACTS in order to ensure national and international comparison of surgical results. This may also give further guidance for improved patient care. 相似文献
84.
85.
Z Kibar S Salem CM Bosoi E Pauwels P De Marco E Merello AG Bassuk V Capra P Gros 《Clinical genetics》2011,80(1):76-82
Kibar Z, Salem S, Bosoi CM, Pauwels E, De Marco P, Merello E, Bassuk AG, Capra V, Gros P. Contribution of VANGL2 mutations to isolated neural tube defects. Vangl2 was identified as the gene defective in the Looptail (Lp) mouse model for neural tube defects (NTDs). This gene forms part of the planar cell polarity (PCP) pathway, also called the non‐canonical Frizzled/Dishevelled pathway, which mediates the morphogenetic process of convergent extension essential for proper gastrulation and neural tube formation in vertebrates. Genetic defects in PCP signaling have strongly been associated with NTDs in mouse models. To assess the role of VANGL2 in the complex etiology of NTDs in humans, we resequenced this gene in a large multi‐ethnic cohort of 673 familial and sporadic NTD patients, including 453 open spina bifida and 202 closed spinal NTD cases. Six novel rare missense mutations were identified in seven patients, five of which were affected with closed spinal NTDs. This suggests that VANGL2 mutations may predispose to NTDs in approximately 2.5% of closed spinal NTDs (5 in 202), at a frequency that is significantly different from that of 0.4% (2 in 453) detected in open spina bifida patients (p = 0.027). Our findings strongly implicate VANGL2 in the genetic causation of spinal NTDs in a subset of patients and provide additional evidence for a pathogenic role of PCP signaling in these malformations. 相似文献
86.
RAJ Windhaber AG Holbrook RJ Krysztopik 《Annals of the Royal College of Surgeons of England》2010,92(4):e10-e11
Chylothorax is a well-recognised complication of oesophagectomy, occurring in around 3% of cases. If managed conservatively, the mortality rate can be over 50%. We describe our experience of managing a patient with a chylothorax following oesophagectomy, and the use of a blood patch (a novel technique) to overcome persistent leakage following re-operation. The authors feel that this technique has the potential for a wider application in the treatment of chyle leak, especially if combined with minimally invasive or radiological techniques. 相似文献
87.
Aim
Right ventricular (RV) systolic function in patients with hypertensive heart disease (HHD) is not well characterised. The primary aim of this study was to assess the systolic function of the right ventricle in patients with HHD using tricuspid annular-plane systolic excursion (TAPSE).Methods
The study was cross-sectional in design and carried out in Kano, Nigeria. Patients were recruited if they had HHD on echocardiography and were at least 15 years of age. Patients with other cardiac pathologies such as ischaemic and valvular heart diseases were excluded. Patients were considered to have abnormal RV systolic function if they had reduced values of TAPSE (< 15 mm). A p-value of < 0.05 was considered statistically significant.Results
A total of 186 patients were serially recruited over seven months. Of these, 131 (70.4%) had normal RV systolic function (group 1) and 55 patients (29.6%) had abnormal function (group 2). Group 2 patients were older (p = 0.002) and had a higher prevalence of peripheral oedema (p = 0.002), moderate to severe dyspnoea, higher heart rate and lower left ventricular ejection fraction (p < 0.001). Atrial arrhythmias were also more prevalent among group 2 patients (p < 0.05). The best correlate to TAPSE was the septal mitral annularplane systolic excursion (r = +0.541, p < 0.001). Several variables such as age predicted the presence of reduced TAPSE.Conclusion
The study found that almost one-third of patients with HHD in Kano had RV systolic dysfunction as defined by reduced TAPSE, and these patients had a greater prevalence of factors associated with morbidity and mortality. 相似文献88.
89.
Dr. M. Wojcinski U. Freitag C. Hösemann H. Perlitz AG Impfen in der Gynäkologie des Berufsverbandes der Frauenärzte e. V. 《Der Gyn?kologe》2014,47(10):791-814
Diseases which can be prevented by vaccination and the indications for vaccination are described in detail with a special focus on aspects relevant for the gynecological and obstetric practice. The article also gives the billing numbers for Germany which are necessary for the remuneration. With this vaccinations can be implemented in the routine daily practice. The gynecologist entrusted by the patient can provide vaccination protection in all phases of life, if necessary even during pregnancy and provide neonates with maternal passive immunity. 相似文献
90.